KR102598386B1 - Backlight unit and liquid crystal display device including same - Google Patents

Abstract

The present embodiments relate to a backlight unit and a liquid crystal display device including the same, wherein the backlight unit includes a light guide plate, a light source assembly disposed adjacent to the light entrance surface of the light guide plate and radiating light to the light entrance surface, and the light source assembly and the light entrance surface. and a shape maintaining member disposed therebetween, wherein the shape maintaining member includes a first adhesive member adhered to the light emitting surface of the light source assembly, a second adhesive member adhered to the light receiving surface, the first adhesive member, and the first adhesive member. By including at least one reinforcing member disposed between two adhesive members to maintain the shape, workability, processability, and mass production can be improved. In addition, it is easy to handle, improving workability, processability, and mass production, making it possible to provide a liquid crystal display device with uniform brightness.

Description

Backlight unit and liquid crystal display device including same}

The present invention relates to a backlight unit and a liquid crystal display device including the same.

As the information society develops, the demand for display devices for displaying images is increasing in various forms, including liquid crystal displays (LCDs), plasma displays, and organic light emitting diodes (OLEDs). ), etc., various types of display devices are being used.

Among these flat panel display devices, the liquid crystal display device includes a liquid crystal panel in which liquid crystal is injected between a thin film transistor substrate and a color filter substrate. Since the liquid crystal display device is a non-light emitting device, a backlight unit to supply light is located on the back of the thin film transistor substrate. The amount of light emitted from the backlight unit is adjusted depending on the arrangement of the liquid crystal.

Backlight units are divided into direct type and edge type depending on the location of the light source. The edge type is a structure in which the light source is placed on the side of the light guide plate, and is mainly applied to relatively small liquid crystal displays such as laptops and notebook computers. This edge-type backlight unit has good light uniformity, long durability, and is advantageous for thinning the liquid crystal display device.

However, in a backlight unit using such an edge-type light guide plate, the light emitted from the light source passes through the air layer to enter the light guide plate, but light is reflected and leaked due to the difference in refractive index between the air layer and the light guide plate, causing a decrease in light efficiency. .

In addition, the light emitted from the light source may not be properly incident on the light guide plate, resulting in hot spots with strong luminance in some areas. When the above-mentioned hot spot occurs, the luminance of the liquid crystal display device may become uneven.

The problem to be solved by the present invention is to provide a backlight unit with improved workability, processability, and mass production through the shape maintenance member by providing a reinforcing member to maintain the shape of the shape maintenance member disposed between the light source package and the light guide plate. It is there.

The problem to be solved by the present invention is to provide a liquid crystal display device with uniform brightness using a shape maintaining member disposed between a light source package and a light guide plate.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A backlight unit according to an embodiment of the present invention for achieving the above problem includes a light guide plate, a light source assembly disposed adjacent to the light entrance surface of the light guide plate and irradiating light to the light entrance surface, and disposed between the light source assembly and the light entrance surface. and a shape maintaining member, wherein the shape maintaining member includes a first adhesive member adhered to the light emitting surface of the light source assembly, a second adhesive member adhered to the light receiving surface, the first adhesive member, and the second adhesive member. It includes at least one reinforcing member disposed therebetween to maintain the shape.

For example, the reinforcing member may be disposed between the first adhesive member and the second adhesive member, where the thickness of the first adhesive member is equal to or greater than the thickness of the second adhesive member.

Additionally, in the shape maintaining member, the first adhesive member, the reinforcing member, and the second adhesive member may have different refractive indices.

The shape maintaining member is formed of a plurality of layers having different refractive indices, and the plurality of layers may be arranged so that the refractive index increases sequentially in the direction from the light source assembly to the light guide plate.

Here, among the plurality of layers, a layer adhesively disposed on the light guide plate may have a refractive index that is the same as that of the light guide plate or a refractive index difference within a range of 0.1.

For example, the reinforcing member may be formed of any one selected from the group consisting of PET (polyethylene terephthalate), PEN (Polyethylene naphthalate), PI (Polyimide), polymethyl methacrylate (PMMA), and polycarbonate (PC: PolyCarbonate). You can..

And the first adhesive member or the second adhesive member may be formed of UV Acryl series.

Additionally, the shape maintaining member may further include a diffusion bead in at least one of the first adhesive member, the second adhesive member, and the reinforcing member.

Meanwhile, the light source assembly includes a light source package including a light source, a support dam on which the light source package is mounted, and a bottom cover accommodating the light source assembly, a light guide plate, and a shape maintaining member, wherein the shape maintaining member is the It may be placed on the bottom cover or the support dam.

Here, the shape maintaining member may further include a transparent member between the support dam and the first adhesive member. The transparent member may be formed of white PET (polyethyleneterephthalate).

As an example, the support dam may be arranged to be seated along a side wall of the bottom cover.

For example, the support dam may be seated along the bottom surface of the bottom cover.

A liquid crystal display device according to another embodiment of the present invention for achieving the above object includes a light guide plate, a light source assembly disposed adjacent to the light entrance surface of the light guide plate and irradiating light to the light entrance surface, and a light source assembly between the light source assembly and the light entrance surface. It includes a shape maintaining member disposed in, wherein the shape maintaining member includes a first adhesive substrate into which a part of the light source assembly is disposed, a second adhesive substrate adhered to the light incident surface, the first adhesive substrate, and the second adhesive substrate. It includes a backlight unit including a reinforcing member disposed between adhesive substrates to maintain the shape, and a liquid crystal panel disposed on the backlight unit.

Specific details of other embodiments are included in the detailed description and drawings.

According to embodiments of the present invention, there are at least the following effects.

According to embodiments of the present invention, the shape maintaining member disposed between the light source package and the light guide plate is provided with a reinforcing member that maintains the shape, thereby improving workability, processability, and mass production through the shape maintaining member. .

According to embodiments of the present invention, there is an effect of uniformly improving luminance by using a shape maintaining member disposed between the light source package and the light guide plate.

The effects according to the present invention are not limited to the contents exemplified above, and further various effects are included in the present specification.

Figure 1 is an exploded perspective view schematically showing a backlight unit and a liquid crystal display device including the same according to an embodiment of the present invention.
Figure 2 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to an embodiment of the present invention.
Figure 3 is an enlarged cross-sectional view of area A of Figure 2.
Figure 4 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.
Figure 5 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.
Figure 6 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.
Figure 7 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.
Figure 8 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.
Figure 9 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

Additionally, when describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the essence, sequence, order, or number of the components are not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there are no other components between each component. It should be understood that may be “interposed” or that each component may be “connected,” “combined,” or “connected” through other components.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Figure 1 is an exploded perspective view schematically showing a backlight unit and a liquid crystal display device including the same according to an embodiment of the present invention, and Figure 2 is a backlight unit and a liquid crystal display device including the same according to an embodiment of the present invention. This is a cross-sectional perspective view.

Referring to FIGS. 1 and 2 , a liquid crystal display device 1 according to an embodiment of the present invention may include a liquid crystal panel 200, a backlight unit 10, and a top cover 100. The liquid crystal panel 200 receives light from the backlight unit 10 and can display images by adjusting the arrangement of liquid crystals that are refracted in different patterns.

The liquid crystal panel 200 includes a first substrate 210 on which a thin film transistor is formed, a second substrate 220 on which a color filter is formed facing the thin film transistor substrate 210, the first substrate 210, and a second substrate 220 on which a color filter is formed. It may include a liquid crystal layer (not shown) interposed between the two substrates 220.

The liquid crystal display device 1 may further include a driver 250 that adjusts the liquid crystal arrangement of the liquid crystal layer. The driving unit 250 may include a flexible printed circuit board (FPC), a driving chip mounted on the flexible printed circuit board, and a circuit board (PCB) connected to the other side of the flexible printed circuit board.

The driving unit 250 shown in the drawing represents a COF (chip on film) method, and other known methods such as TCP (taper carrier package) and COG (chip on glass) are also possible. Additionally, it is possible for some or all of the driving units 250 to be mounted on the first substrate 210 on which thin film transistors are formed.

The top cover 100 may include a border 110 surrounding the edge of the liquid crystal panel 200, and a top cover side wall 120 extending around the outer edge of the border 110 toward the top cover 100. Here, the area of the liquid crystal panel 200 other than that surrounded by the border 110 of the top cover 100 is the active area where the screen is displayed, and the top cover 100 is open to expose the display area. .

A backlight unit 10 may be disposed behind the liquid crystal panel 200. The backlight unit 10 is a device that changes a point light source or a line light source into a plane light source.

The backlight unit 10 may include a light guide plate 700, an optical member 400, a light source assembly 600, a bottom cover 900, a guide cover 300, and a shape reinforcing member 1000.

The bottom cover 900 may have a space to accommodate the light guide plate 700, the reflective sheet 800, the light source assembly 600, and the shape reinforcing member 1000. Specifically, the bottom cover 900 may include a bottom plate 910 and a bottom cover side wall 950 that protrudes upward and extends along the circumference of the bottom plate 910. In addition, the bottom cover side wall 950 may include a bottom cover upper plate 970 that is partially bent into the receiving space and formed parallel to the bottom plate 910. Here, the shape of the bottom cover 900 is explained as an example, and it can be formed in various shapes as long as it can form the accommodation space.

The reflective sheet 800 may be disposed within the receiving space of the bottom cover 900. For example, the reflective sheet 800 may be disposed along the inside of the bottom plate 910, the side wall 950, and the top plate 970 of the bottom cover 900. As another embodiment, the reflective sheet 800 may be disposed only on the inner surface of the bottom plate 910 of the bottom cover 900. The drawing shows a reflective sheet 800 disposed along the inside of the bottom cover 900.

The reflective sheet 800 is disposed below the light source assembly 600 and can guide light leaking to the bottom of the light source assembly 600 back toward the liquid crystal panel 200. The reflective sheet 800 can be used as long as it is made of a reflective material, such as plastic or metal with reflectivity.

The light source assembly 600 may be disposed along the bottom cover side wall 950 in a spatial area formed by overlapping the bottom plate 910 and the bottom cover top plate 970. The light source assembly 600 may include a light source package 500 including a light source 510 and a support dam 650.

The light source package 500 may include a light source 510, a mold 530 that accommodates the light source 510, and a molding material 570 that seals the mold 530.

The light source 510 may be formed of a fluorescent lamp or a light-emitting device. The light emitting device may be a light emitting diode (LED), inorganic EL, organic EL, etc. In this embodiment, the case where a light emitting diode (LED) is used as the light source 510 will be described as an example.

The mold 530 has a front surface (532) in the direction of emitting light, a rear surface (537) that is the opposite side of the front surface (532), and a side surface to connect the rear surface (537) and the front surface (532). It may include a side 535 formed in .

The mold 530 may include a depression on the mold front 532 as a space for accommodating the light source 510, and the light source 510 may be placed in the depression. By placing the light source 510 in the recessed portion of the mold 530, light can be emitted in the direction toward the front surface 532 of the mold.

The depression may be filled with molding material 570. The molding material 570 may serve to protect the light source 510 from the external environment. The molding material 570 may include a phosphorescent or fluorescent material. Accordingly, the light source package 500 can emit a desired color to the outside by passing the light emitted from the light source 510 through the molding material 570.

For example, the light source package 500 may emit white light by arranging the emission color of the light source 510 and the phosphorescent or fluorescent color of the molding material 570 in complementary colors. As another example, a red light emitting diode, a green light emitting diode, and a blue light emitting diode may be arranged respectively, and the respective light emitting colors may be mixed to provide white light.

The light source package 500 may be supported/fixed to the support dam 650. The support dam 650 may be disposed on the bottom cover side wall 950 or on the bottom surface 910 of the bottom cover 900. In this embodiment, the support dam 650 will be described by showing that it is disposed along the bottom cover side wall 950.

Specifically, the support dam 650 may be seated along the bottom cover side wall 950 in an area where the bottom surface 910 of the bottom cover 900 and the bottom cover upper plate 970 overlap.

For example, the support dam 650 is seated on a mounting surface 654 on which the light source package 500 is mounted, a seating surface 652 disposed on a surface facing the mounting surface 654, and a mounting surface 654. A support dam side 657 formed by connecting the ends of the surface 652 may be provided.

As another example, when the support dam 650 is seated on the bottom surface 910 of the bottom cover 900, the mounting area of the light source package 500 on the mounting surface 654 of the support dam 650 is adjusted. The separation distance from the light receiving surface 700a of the light guide plate 700 can be adjusted.

The above-mentioned support dam 650 adjusts the separation distance between the light source package 500 and the light incident surface 700a of the light guide plate 700 to prevent collision between the light guide plate 700 and the light source package 500, and furthermore, the light source ( By adjusting the distance between 510 and the light guide plate 700, the amount of light entering the light guide plate 700 can be adjusted.

Here, as shown in the drawing, when the support dam 650 is seated on the bottom cover side wall 950, the separation distance from the light incident surface 700a of the light guide plate 700 can be adjusted depending on the thickness of the support dam side 657. You can. By adjusting this, the amount of light entering the light guide plate 700 can be adjusted.

In other words, by adjusting the separation distance between the light source 510 and the light incident surface 700a of the light guide plate 700 using the support dam 650, the number of light sources 510 and light uniformity, which are a trade-off, are appropriately adjusted. It can be adjusted.

Referring again to FIGS. 1 and 2 , the rear 537 of the light source package 500 can be mounted on the mounting surface 654 of the support dam 650, so that the front 532 of the mold 530 from which light is emitted This light guide plate 700 may be arranged to face the light receiving surface 700a.

The light guide plate 700, which serves to guide the light supplied from the light source assembly 600 to the liquid crystal panel 200, may be disposed at the rear of the liquid crystal panel 200. Specifically, the light guide plate 700 may be disposed between the liquid crystal panel 200 and the reflective sheet 800.

The light guide plate 700 has a light incident surface 700a provided on the side surface to allow light emitted from the light source assembly 600 to enter, a light exit surface 700c disposed on the upper surface facing the liquid crystal panel 200, and a light exit surface that is the upper surface. It may be disposed on the other side of (700c) and include a reflective surface (700d) on the lower surface facing the reflective sheet (800).

Here, the light supplied from the light source assembly 600 may provide light to the liquid crystal panel 200 through the light exit surface 700c, which is the upper surface of the light guide plate 700. And the light receiving surface 700b may be disposed on the surface facing the light receiving surface 700a. A plurality of scattering patterns (not shown) that reflect light in the direction of the light exit surface 700c of the light guide plate 700 may be disposed on the light entering surface 700b and the reflecting surface 700d of the light guide plate 700. The scattering pattern can change the optical path so that the light remaining inside the light guide plate 700 is scattered and emitted in the direction of the light exit surface 700c of the light guide plate 700.

As described above, the light guide plate 700 may be formed of a material containing light-transmitting glass, quartz, polymer, etc. so that light can be efficiently guided. For example, the polymer may be made of a material having a predetermined refractive index, such as an acrylic resin such as polymethyl methacrylate (PMMA) or polycarbonate (PC: PolyCarbonate).

The light source assembly 600 may be arranged parallel to the light incident surface 700a of the light guide plate 700. The light source assembly 600 may be arranged in various ways depending on the shape of the light guide plate 700. For example, if the light guide plate 700 is formed in an edge shape and the light receiving surface 700a is defined on only one side of the light guide plate 700, the light source assembly 600 can be placed on only one side.

In addition, when the light receiving surface 700a of the light guide plate 700 is of a flat type defined on both sides, the light source assembly 600 can be placed on both left and right sides of the light receiving surface 700a. Alternatively, as shown, the light source assembly 600 may be placed on only one side of the flat light guide plate 700.

A shape maintaining member 1000 is disposed between the light source assembly 600 and the light guide plate 700. The shape maintaining member 1000 may be arranged to extend along the light receiving surface 700a of the light guide plate 700. Specifically, the shape maintenance member 1000 may be disposed between the mold front 532 of the light source package 500 and the light incident surface 700a of the light guide plate 700.

Conventionally, the position where the shape maintaining member 1000 is placed was filled with air. In the air layer (air), which is a space filled with air, light emitted from the light source package 500 passed through the air layer (air) and entered the light guide plate 700.

In this case, there was a problem in that the amount of light entering the light guide plate 700 decreased due to the difference in refractive index between the air layer and the light guide plate 700. To prevent this, a gap filler in liquid form (optical clear resin (OCR)) or solid form (optical clear adheresive (OCA)) was used in the air layer.

When the liquid form is used to form the gap filler disposed between the light guide plate 700 and the light source package 500, overflow defects may occur around the light receiving surface 700a due to the gap filler being liquid. In addition, the liquid gap filler requires a separate injection device during the formation process due to the above-mentioned physical properties.

When using a solid gap filler, sagging defects may occur due to the ductility of the solid gap filler. Due to the above-mentioned physical properties, the thickness and width of the solid gap filler are not constant, causing a decrease in luminance efficiency. In addition, solid gap filler is difficult to cut, causing an increase in manufacturing costs to provide equipment to supplement it.

However, the backlight unit 10 and the liquid crystal display device 1 including the same according to the present embodiment have a uniform thickness by making up for the shortcomings of the liquid or solid gap filler, are highly reliable even at high temperatures, and maintain elasticity. Through the shape maintaining member 1000, mass production of the backlight unit 1 can be improved and uniform brightness can be provided to the liquid crystal display device 1.

A detailed description of the specific structure and function of the shape maintaining member 1000 described above will be described later.

The optical member 400 may be disposed between the light exit surface 700c of the light guide plate 700 and the liquid crystal panel 200. The optical member 400 may include a protective film 410, a light-collecting film 420, a diffusion film 430, etc.

The diffusion film 430 may serve to diffuse the light provided from the light source module 600 and supply it to the liquid crystal panel 200. The diffusion film 430 may scatter/diffuse light to prevent bright/dark areas present in the backlight unit 10 disposed on the rear of the liquid crystal panel 200 from being projected onto the liquid crystal panel 200.

The light collection film 420 may serve to condense the light diffused by the diffusion film 430 in a direction perpendicular to the plane of the upper liquid crystal panel 200. The light-collecting film 420 may be formed with a triangular prism pattern having a certain arrangement on the upper surface of the substrate. Two light-collecting films 420, which are usually used, may be arranged so that the micro prism patterns are orthogonal to each other. Most of the light passing through the light collection film 420 travels vertically, thereby providing uniform luminance.

The protective film 410, which is located at the top of the optical film 400 and can protect the micro-prism pattern of the light-collecting film 420, which is vulnerable to scratches such as dust, can be placed on the top of the light-collecting film 420. .

A guide cover 300 is disposed between the bottom cover 900 and the top cover 100 to support/fix the optical member 400. And the liquid crystal panel 200 may be placed on the guide cover 300. Specifically, an end of the liquid crystal panel 200 may be supported on the support end 310 of the guide cover 300. Accordingly, the liquid crystal panel 200 is supported on the guide cover 300 and disposed between the top cover 100 and the guide cover 300 and can be supported/fixed by joining the two components.

The guide cover 300 includes a guide cover side wall 320 fastened to the bottom cover side wall 970, a support end 310 bent from the guide cover side wall 320 and seated on the bottom cover upper plate 970, and a support end 310. ) may include a fixing end 350 that extends to overlap the light guide plate 700 and presses and secures the light guide plate 700.

The fixed end 350 may support/fix the light guide plate 700 by pressing the edge of the light output surface 700c of the light guide plate 700. In addition, the ends of the optical member 400 can be placed correspondingly in the space formed by the support end 310 and the fixed end 320, thereby preventing the optical member 400 from moving by supporting/fixing the optical member 400. You can.

Here, the shape of the guide cover 300 is explained as an example, and it can be used in any shape as long as it can support the light guide plate 700, the optical member 400, and the liquid crystal panel 200.

In this way, the backlight unit 10 and the liquid crystal display device 1 including the same according to the present embodiment have a uniform thickness, are highly reliable even at high temperatures, and maintain elasticity and maintain the backlight through the shape maintaining member 1000. The workability, processability, and mass production of the unit 1 can be improved, and uniform brightness can be provided to the liquid crystal display device 1.

Hereinafter, the shape maintenance member 1000 of the backlight unit 10 will be described in detail.

FIG. 3 is an enlarged cross-sectional view of area A of FIG. 2, FIG. 4 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention, and FIG. 5 is another embodiment of the present invention. This is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same.

Here, FIGS. 3 to 5 will be described by referring to FIGS. 1 to 3 to avoid redundant description and for easy explanation.

Referring to FIG. 3, the shape maintaining member 1000 is made of a transparent material to transmit light to the light guide plate 700, and a material having a similar refractive index to that of the light guide plate 700 may be used.

The shape maintaining member 1000 includes a first adhesive member 1100 adhered to the front of the light source package 500, a second adhesive member 1200 adhered to the light receiving surface 700a of the light guide plate 700, and a first adhesive member. It is disposed between 1100 and the second adhesive member 1200 and includes a reinforcing member 1500 that maintains the shape of the shape maintaining member 1000.

Here, the first adhesive member 1100, the second adhesive member 1200, and the reinforcing member 1500 may be formed of materials having different refractive indices or may be formed of materials having the same refractive index. Additionally, this embodiment will be described by taking an example in which the first adhesive member 1100 and the second adhesive member 1200 are formed to have the same thickness.

The first adhesive member 1100 may be disposed to be adhesive to the light source assembly 600. Specifically, the first adhesive member 1100 may be adhered to the front of the light source package 500 of the light source assembly 600. More specifically, the first adhesive member 1100 may be adhered to the front surface 532 of the mold.

Here, the first adhesive member 1100 can be formed of a UV Acryl-based material, but is not limited to this, and any material that has viscous and elastic properties and is made of a transparent material can be used. That is, the first adhesive member 1100 has viscosity, elasticity, etc. due to the UV Acryl-based physical properties, so that it can be adhered to adjacent components, and due to its elasticity, it is pressed or inserted into the interior of the first adhesive member 1100. It can be a shape.

Therefore, due to the material properties of the first adhesive member 1100, it is easy to adhere to the light source package 500, making it easy to prevent the shape of the optical interface, thereby minimizing light loss.

As described above, when the light source package 500 is pressed to the first adhesive member 1100 to align the components due to the physical properties of the first adhesive member 1100, a portion of the front surface of the light source package 500 is exposed to the first adhesive member 1100. It may be arranged to be recessed or recessed into a part of the adhesive member 1100. Here, the light source package 500 defines a part of the first adhesive member 1100 as the lead-in area (IA).

As described above, as a portion of the front surface of the light source package 500 enters the entrance area (IA) of the first adhesive member 1100, a gap consisting of an air layer is formed between the light source package 500 and the light guide plate 700. It can be eliminated or the width of the gap can be reduced. Specifically, a gap consisting of an air layer between the light source package 500 and the first adhesive member 1100 can be eliminated or the width of the gap can be reduced.

For example, when the shape maintaining member 1000 and the light source package 500 are simply brought into close contact, there is a gap between the light source package 500 and the shape maintaining member 1000, or between the shape maintaining member 1000 and the light guide plate 700. An optical interface may be formed between the light incident surfaces 700a.

The optical interface formed between the above-described members may form a difference in refractive index, resulting in reflection of light due to the difference in refractive index. That is, light leaking to the outside between the light source package 500 and the first adhesive member 1100 may be generated.

However, as in the present embodiment, when the gap between the shape maintaining member 1000 and the light source package 500 is completely filled, the backlight unit 10 forms a light path in which the light provided from the light source package 600 is refracted by an air layer. By removing , the amount of light leaking due to the difference in refractive index can be minimized. In other words, light is emitted from the inside of the shape maintaining member 1000, thereby increasing the amount of light entering the shape maintaining member 1000.

Therefore, by inserting a part of the light source package 500 into the shape maintaining member 1000, the light path through which the light provided from the light source package 500 leaks due to the optical interface can be eliminated. Accordingly, the amount of light provided to the light input surface 700a of the light guide plate 700 can be increased, and the luminous efficiency of the backlight unit 10 can be increased.

Additionally, the light source assembly 600 can be formed by mounting the light source package 500 on the mounting surface 654 of the support dam 650. Here, the front of the light source package 500 should be arranged in the direction normal to the mounting surface 654 of the support dam 650 so that the front of the light source package 500 faces the light incident surface 700a of the light guide plate 700. do.

However, in the process of mounting the light source package 500 on the mounting surface 654 of the support dam 650, the front surface of the light source package 500 is not aligned in the normal direction of the mounting surface 654 of the support dam 650. Maybe not. Alternatively, during the process of mounting the light source package 500 on the mounting surface 654 of the support dam 650, the mounting height of each light source package 500 may be formed to be different.

In other words, the front of the light source package 500 may be arranged in a direction inclined with respect to the normal direction of the mounting surface 654 of the support dam 650, and the mounting height may be arranged at different positions. In this way, when the front of the light source package 500 is formed in an inclined direction or the mounting height is formed at a different level, the amount of light incident on the shape maintaining member 1000 or the light guide plate 700 may be reduced. As a result, light leaking to the outside of the light receiving surface 700a of the light guide plate 700 may be generated.

That is, the amount of light provided to the light incident surface 700a of the light guide plate 700 may decrease, and hot spots may be generated due to the presence of bright and dark areas. Here, a hot spot refers to a phenomenon in which the surrounding area appears relatively dark due to the curved area.

However, as in the present embodiment, when the light source package 500 is arranged so that a portion of the first adhesive member 1100 is retracted, the front of the light source package 500 is formed in an inclined direction or has a different mounting height. Even when formed, since the light source package 500 is disposed to enter the first adhesive member 1100, light is scattered inside the shape maintaining member 1000 and provided to the light input surface 700a of the light guide plate 700. The loss of light can be reduced.

As described above, the shape maintaining member 1000 may further include diffusion beads, etc. in the first adhesive member 1100 to increase light scattering efficiency inside the shape maintaining member 1000. Here, for example, the first adhesive member 1100 is described, but the diffusion bead can be placed on at least one of the first adhesive member 1100, the second adhesive member 1200, and the reinforcing member 1500. there is.

In this way, the first adhesive member 1100, which is disposed so that the light source package 500 is inserted, prevents light leakage due to the optical interface and reduces the amount of light, thereby increasing the amount of light provided to the light guide plate 500, thereby increasing the amount of light provided to the backlight unit ( 10) The light efficiency can be improved.

The second adhesive member 1200 can be formed of the same UV Acryl series as the first adhesive member 1100, but is not limited to this. Since any material that has viscous and elastic properties can be used, different materials can be used. It may be possible. The second adhesive member 1200 may be adhered to the light receiving surface 700a of the light guide plate 700.

The reinforcing member 1500 may be disposed between the first adhesive member 1100 and the second adhesive member 1200. Specifically, one surface of the reinforcing member 1500 may be placed in contact with the first adhesive member 1100. One side of the first adhesive member 1100 may be adhered to the light source package 500, and the other side may be placed in contact with the reinforcing member 1500.

The reinforcing member 1500 may be formed of any one selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polymethyl methacrylate (PMMA), and polycarbonate (PC). You can.

In this way, the reinforcing member 1500 can be disposed between the first adhesive member 1100 and the second adhesive member 1200 to reinforce the shape of the shape maintaining member. Therefore, as the shape is strengthened, handling becomes easier, and the workability, processability, and mass production of the shape maintaining member 1000 can be improved.

And the other surface of the reinforcing member 1500 may be placed in contact with the second adhesive member 120. Specifically, one surface of the second adhesive member 1200 may be adhered to the light receiving surface 700a of the light guide plate 700, and the other surface may be placed in contact with the other surface of the reinforcing member 1500.

In this way, the shape maintaining member 1000 includes a reinforcing member 1500 that reinforces the flexibility of the first adhesive member 1100 and the second adhesive member 1200. ) By placing it between them, workability and processability can be improved.

Meanwhile, the lower and upper surfaces formed by the thickness of the shape maintaining member 1000 may be adhered to the bottom cover 900. Since the first adhesive member 1100 and the second adhesive member 1200 of the shape maintaining member 1000 are made of viscous properties, their thickness also has viscous properties and can be adhered to the bottom cover 900. Here, the thickness surface is defined as the thickness formed through the first adhesive member 1100, the second adhesive member 1200, and the reinforcing member 1500.

As shown in the drawing, the upper surface of the thickness surface of the shape maintaining member 1000 may be adhered to the upper plate 9700 of the bottom cover 900. And the lower surface of the thickness surface may be adhered to the bottom plate 910 of the bottom cover 900.

In this way, the shape maintaining member 1000 can be adhered to and supported/fixed to the bottom cover 900 due to the physical properties of the first adhesive member 1100 and the second adhesive member 1200, thereby stably supporting the light guide plate 700. Light can be transmitted.

Referring to FIG. 4, the shape maintaining member 1000-1 may include a plurality of adhesive members 1100, 1200, and 1300 and a plurality of reinforcing members 1600 and 1700.

The shape retention rate of the shape maintenance member 1000-1 may be reduced due to the material characteristics of the adhesive members 1100, 1200, and 1300. To compensate for this, the shape retention rate can be improved by arranging a plurality of reinforcing members 1600 and 1700 between the adhesive members 1100, 1200 and 1300.

Specifically, the shape maintaining member 1000-1 is a first reinforcing member 1600 disposed between the first adhesive member 1100 and the third adhesive member 1300, the third adhesive member 1300, and the second adhesive member. It may include a second reinforcing member 1700 disposed between the members 1200.

Here, the first adhesive member 1100, the second adhesive member 1200, and the third adhesive member 1300 may use the same material, but each of them may use a different material.

Additionally, the first reinforcing member 1600 and the second reinforcing member 1700 may be made of the same material, but may be made of different materials.

To explain with a specific example, the refractive index of the light guide plate 700 is defined as 1.5, the first adhesive member 1100 adjacent to the light source package 500 uses a material with a refractive index of 1.1, and the first adhesive member 1100 The first reinforcing member 1600 in contact with may be made of a material having a refractive index of 1.2.

And the third adhesive member 1300 placed in contact with the first reinforcing member 1600 uses a material having a refractive index of 1.3, and the second reinforcing member 1700 placed in contact with the third adhesive member 1300 has a refractive index of 1.4. Materials having can be used. And the second adhesive member 1200 disposed in contact with the second reinforcing member 1700 may be made of a material having a refractive index of 1.5. Here, like the second adhesive member 1200, a component disposed in contact with the light incident surface 700a of the light guide plate 700 can minimize the difference in refractive index with the light guide plate 700 or be arranged to be the same.

In this way, the refractive index of the shape maintaining member 1000-1 can be gradually increased to minimize the difference in refractive index between the adhesive member disposed adjacent to the light guide plate 700 and the light guide plate 700. For this purpose, the shape maintaining member 1000-1 can be arranged in multiple layers.

Accordingly, the second adhesive member 1200 adjacent to the light guide plate 700 uses a material that has the same refractive index as that of the light guide plate 700 or has a minimal difference in refractive index, thereby reducing reflected light generated due to the difference in refractive index. Accordingly, light loss of the backlight unit 10-1 can be reduced by reducing reflected light that may be generated due to a large difference in refractive index between the light source package 500 and the light guide plate 700.

Therefore, the backlight unit 10-1 and the liquid crystal display device 1-1 including the same are prevented from leaking light due to the difference in refractive index through the multi-layered shape maintaining member 1000-1 in which the difference in refractive index is gradually reduced. ) can improve the light efficiency.

Referring to FIG. 5, the shape maintaining member 1000-2 includes adhesive members 1100-2 and 1200-2 formed with an asymmetric thickness, and adhesive members 1100-2 and 1200-2 formed with an asymmetric thickness. It may include a reinforcing member 1500-2 disposed between them.

The shape maintenance member 1000-2 causes interference between the light source package 500 and the reinforcing member 1500-2 for maintaining the external shape due to the insertion of the light source package 500 into the first adhesive member 1100-2. It can be. To compensate for this, the thickness of the first adhesive member 1100-2 and the thickness of the second adhesive member 1200-2 may be arranged to have different thicknesses.

In other words, the reinforcing member 1500-2 disposed between the first adhesive member 1100-2 and the second adhesive member 1200-2 is disposed asymmetrically to form the reinforcing member 1500-2 and the light source package ( 500) interference between devices can be minimized.

Specifically, the shape maintaining member 1000-2 may be formed so that the first adhesive member 1100-2 is thicker than the second adhesive member 1200-2. In this way, as the reinforcing member 1500-2 is disposed between the first adhesive member 1100-2 and the second adhesive member 1200-2 formed with different thicknesses, the position of the reinforcing member 1500-2 is asymmetric. It can be deployed as an enemy.

As previously stated, the light source package 500 may be inserted into or recessed in the first adhesive member 1100-2. Accordingly, depending on the degree to which the light source package 500 is inserted into the first adhesive member 1100-2, there may be cases where it comes into contact with the reinforcing member 1500-2. Therefore, when the light source package 500 is inserted into the first adhesive member 1100-2, the extent to which the light source package 500 is inserted may be limited due to the reinforcing member 1500-2.

By making the thickness of the first adhesive member 1100-2 relatively thick compared to the second adhesive member 1200-2 to overcome the above-mentioned limitation, the degree of freedom in the insertion degree of the light source package 500 can be improved.

In addition, the light emitted from the light source package 500 passes through the first adhesive member 1100-2, the reinforcing member 1500-2, and the second adhesive member 1200-2. ) and the thickness of the second adhesive member 1200 are arranged to be the same, as a part of the light source package 500 is introduced into the first adhesive member 1100, the light emitted from the light source package 500 is the first adhesive member 1100. The area passing through the adhesive member 1100 is relatively reduced.

Accordingly, in this embodiment, the first adhesive member 1100-2 is formed to be relatively thicker than the second adhesive member 1200-2, so that the emitted light is transmitted through the first adhesive member 1100-2 and the second adhesive member 1200-2. The area that must pass through -2) can be adjusted.

Therefore, the area where light must pass through the first adhesive member (1100-2) and the second adhesive member (1200-2), that is, the passing areas of the two structures are designed to be similar, and the predetermined first adhesive member (1100-2) -2) and light control may be possible based on the refractive index of the second adhesive member 1200-2.

In this way, the shape maintaining member 1000-2 includes a reinforcing member 1500-2 that reinforces the flexibility of the first adhesive member 1100-2 and the second adhesive member 1200-2. By arranging asymmetrically between -2) and the second adhesive member (1200-2), workability, processability and mass production are improved, the degree of freedom in the insertion degree of the light source package 500 is improved, and light control by refractive index, etc. may be possible.

Therefore, the backlight unit 10-2 and the liquid crystal display device 1-2 including the same according to this embodiment have a uniform thickness, high reliability even at high temperatures, and a shape maintaining member 1000- that maintains elasticity. Through 2), the workability, processability, and mass production of the backlight unit 10-2 can be improved, and the luminance uniformity of the liquid crystal display device 1-2 can be improved.

Figure 6 is a cross-sectional perspective view showing a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.

Here, FIG. 6 will be described by referring to FIGS. 1 to 3 to avoid redundant description and for easy explanation.

Referring to FIG. 6, the backlight unit 10-3 includes a light source assembly 600 including a support dam 650 and a light source package 500, and a shape maintaining member 1000-3 disposed between the light guide plate 700. ), but the shape maintaining member 1000-3 may further include a transparent member 1900 disposed in contact with the support dam 650.

The transparent member 1900 can be made of transparent material or white color, and can be made of PET material, etc., but is not limited to this, and any material can be used as long as it is transparent or white and has high reliability at high temperatures.

For a specific example, the shape maintaining member 1000-3 includes a transparent member 1900, a first adhesive member 1100, a reinforcing member 1500, and a second adhesive member 1200 sequentially from the support dam 650. can be placed.

One side of the transparent member 1900 may be placed in contact with the support dam 650, and the other side facing the one side may be placed in contact with the first adhesive member 1100. To be more specific, the support dam 650 includes a mounting surface 654 on which the light source package 500 is mounted, a seating surface 652 facing the mounting surface 654, a mounting surface 654, and a seating surface ( A support dam side (657) connecting 652) is provided.

The seating surface 652 is seated on the bottom cover side wall 950, and the mounting surface 654 faces the light receiving surface 700a of the light guide plate 700. Accordingly, one side of the transparent member 1900 may be mounted on the mounting surface 654 of the support dam 650, and the other side may be placed in contact with the first adhesive member 1100.

Additionally, the transparent member 1900 may have an open portion that is open corresponding to the shape of the light source package 500 disposed on the support dam 650. Since the open portion can form an optical interface when the transparent member 1900 and the light source package 500 are placed in contact with each other, the open portion is formed on the transparent member 1900 to form the transparent member 1900 and the light source package 500. It can prevent the formation of an optical interface between the liver. Additionally, by placing the transparent member 1900 on the side of the light source package 500, light leaking from the side of the light source package 500 can be guided toward the light guide plate 700.

Here, the thickness of the transparent member 1900 may be arranged to be the same as the mounting height of the light source package 500, but may be formed at a different height.

For example, when the light source package 500 is mounted on the support dam 650, its mounting height may be different. Accordingly, an optical interface may be formed between the first adhesive member 1100 and the light source package 500 due to the light source packages 500 formed at different heights.

To prevent this, the transparent member 1900 is preferably formed at a height lower than the height of the light source package 500. For example, when the transparent member 1900 is disposed at a higher height than the light source package 500, the light source package 500 may be buried in the transparent member 1900.

That is, when the light source package 500 is buried in the transparent member 1900, an optical interface may be formed between the light source package 500 and the first adhesive member 1100. On the other hand, when the transparent member 1900 is formed lower than the height of the light source package 500, the front surface of the light source package 500 may protrude and be retracted into the first adhesive member 1100. Accordingly, the formation of an optical interface between the light source package 500 and the first adhesive member 1100 can be prevented.

When the transparent member 1900 is formed lower than the height of the light source package 500, the transparent member 1900 is wrapped around the side area of the light source package 500, that is, the mold side wall 535, in response to the formation of an optical interface. By arranging the light leaking into the side area of the light source package 500, light can be guided toward the light guide plate 700 through the transparent member 1900.

Accordingly, the transparent member 1900 can increase the amount of light of the backlight unit 10-3 by guiding light leaking from the side of the light source package 500 toward the light guide plate 700.

In this way, the shape maintaining member 1000-3 includes a reinforcing member 1500 that reinforces the flexibility of the first adhesive member 1100, the second adhesive member 1200, and the transparent member 1900. ) and the second adhesive member 1200, workability, processability, etc. can be improved.

In addition, the backlight unit 10-3 and the liquid crystal display device 1-3 including the same according to this embodiment have a uniform thickness, high reliability even at high temperatures, and a shape maintaining member 1000- that maintains elasticity. Through 3), the workability, processability, and mass production of the backlight unit 10-3 can be improved, and the luminance uniformity of the liquid crystal display device 1-3 can be improved.

Figure 7 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.

Here, Figure 7 will refer to Figures 1 and 2 to avoid redundant explanation and for easy explanation.

Referring to FIG. 7, the backlight unit 10-4 and the liquid crystal display device 1-4 including it include a support dam 650-4 mounted on the bottom surface 910 of the bottom cover 900, and a support dam 650-4. A light source package 500-4 mounted on the mounting surface 654 of the dam 650-4 may be provided. Here, the light source package 500-4 is mounted on the side 532 of the mold 530 on the mounting surface 654 of the support dam 650-4, so that the front 532 of the mold 530 is on the light guide plate 700. It may be arranged to face the light receiving surface 700a.

And the end of the support dam 650-4, that is, the side 657 of the support dam 650-4 and the front of the light source package 500-4 can be arranged to be on the same plane. Alternatively, the front of the light source package 500-4 may be arranged to protrude at a predetermined interval so that a portion of the front of the light source package 500-4 is drawn into the first adhesive member 1100-4. Here, for ease of explanation, the side 657 of the support dam 650-4 and the front of the light source package 500-4 will be described by showing a drawing arranged so that it is on the same plane.

The support dam 650-4 may be disposed along an area where the bottom surface 910 of the bottom cover 900 and the top plate 970 of the bottom cover 900 overlap. And the seating surface 652 of the support dam 650-4 may be arranged to be seated on the bottom surface 910 of the bottom cover 900 in the overlap area.

Some areas of the shape maintaining member 1000-4 may be adhered to the front of the light source package 500-4, and other areas of the shape maintaining member 1000-4 may be attached to the side of the support dam 650-4 ( 657).

For a specific example, the thickness surface of the shape maintaining member 1000-4 is adhered to the bottom cover 900, and more specifically, the upper portion of the thickness surface of the shape maintaining member 1000-4 is attached to the top plate 970 of the bottom cover. It may be placed in contact with, and the lower portion of the thickness surface of the shape maintaining member 1000-4 may be placed in contact with the bottom plate 910 of the bottom cover.

In addition, part of the surface of the first adhesive member 1100-4 is adhered to the light source package 500-4, and the other surface of the first adhesive member 1100-4 is attached to the side of the support dam 650-4 ( 657). In other words, the side 657 of the support dam 650-4 and the front surface of the light source package 500-4 may be formed on the same plane. The first adhesive member 1100-4 may be adhered to the same plane as the side 657 of the support dam 650-4 and the front surface of the light source package 500-4.

In this embodiment, the side 657 of the support dam 650-4 and the front surface of the light source package 500-4 are shown and explained in the drawing as being formed on the same plane. However, this is only one embodiment, and other For example, the front of the light source package 500-4 may be arranged to partially protrude beyond the side 657 of the support dam 650-4. Here, when the front of the light source package 500-4 is arranged to partially protrude, the protruding front of the light source package is partially drawn into the first adhesive member, thereby preventing the formation of an optical interface and reducing the amount of reflected light.

In this way, the side 657 of the support dam 650-4 and the front of the light source package 500-4 are arranged to have the same surface or are arranged to partially protrude, thereby preventing the formation of an optical interface and reducing the amount of reflected light. You can.

Meanwhile, the second adhesive member 1200-4 may be adhered to the light incident surface 700a of the light guide plate 700.

In this way, by arranging the mounting surface 654 of the support dam 650-4 and the side of the light source package 500-4 to be mounted, it is easy to fix the shape maintaining member 1000-4, and the light source assembly 600-4 The formation space of -4) can be reduced, and the backlight unit 10-4 can be made light, thin and short.

In addition, the shape maintaining member 1000-4 includes a reinforcing member 1500-4 that reinforces the flexibility of the first adhesive member 1100-4 and the second adhesive member 1200-4. 4) and the second adhesive member 1200-4, workability and processability can be improved.

As such, the backlight unit 10-4 and the liquid crystal display device including the same according to this embodiment have a uniform thickness, are highly reliable even at high temperatures, and maintain elasticity through the shape maintaining member 1000-4. The work line, processability, and mass production of the backlight unit 10-4 can be improved, and the luminance uniformity of the liquid crystal display device 1-4 can be improved.

Figure 8 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device including the same according to another embodiment of the present invention.

Here, to avoid redundant description and for easy explanation, the description will be made by citing FIGS. 1 and 2.

Referring to FIG. 8, the backlight unit 10-5 and the liquid crystal display device 1-5 including the same may have a shape maintaining member 1000-5 disposed on the support dam 650-5. One side of the thickness surface of the shape maintaining member 1000-5 is adhered to the mounting surface 654 of the support dam 650-5, and the other side of the thickness surface of the shape maintaining member 1000-5 is attached to the bottom cover 900. It can be adhered to the top plate 970.

The light source package 500-5 is mounted on a portion of the mounting surface 654 of the support dam 650-5, and a shape maintenance member 1000-5 is placed between the light guide plate 700 and the light source package 500-5. is disposed, the shape maintaining member 1000-5 may be disposed on the mounting surface 654 of the support dam 650-5. Here, the area where the shape maintaining member 1000-5 is disposed on the mounting surface 654 of the support dam 650-5 is defined as the second area SA.

Specifically, the mold side 537 of the light source package 500-5 is mounted on the first area FA of the mounting surface 654 of the support dam 650-5, and the mold side 537 of the light source package 500-5 is mounted on the mounting surface 654 of the support dam 650. The shape maintaining member 1000-5 may be disposed on the second area SA of 654. Here, the second area SA may be disposed between the first area FA and the light incident surface 700a of the light guide plate 700.

Accordingly, one side of the support dam side 657 is in close contact with the side wall 950 of the bottom cover 900, and the other side of the support dam side 657 facing the one side is in contact with the light incident surface 700a of the light guide plate 700. It may adhere closely to some areas.

In this way, the other side of the support dam side 657 is placed in close contact with a part of the light receiving surface 700a of the light guide plate 700, resulting in the effect of partially blocking the dense light area where light is concentrated by the support dam 650-5. The hot spot area can be reduced.

In addition, as the shape maintaining member 1000-5 is disposed on the support dam 650-5, the backlight unit 10-5 can be made light, thin and short, and the shape maintaining member 1000-5 is manufactured in a small size. This can reduce material costs.

As described above, the shape maintaining member 1000-5 can be placed on the support dam 650-5 by the reinforcing member 1500-5 capable of maintaining the shape of the shape maintaining member 1000-5. Because it can maintain a hard shape, it is easy to handle and the manufacturing process can be improved. In addition, mass productivity can be improved due to the hard shape of the shape maintaining member 1000-5, so mass productivity of the backlight unit 10-5 can also be improved.

Figure 9 is a cross-sectional perspective view of a backlight unit and a liquid crystal display device according to another embodiment of the present invention.

Here, to avoid redundant description and for easy explanation, the description will be made by citing FIGS. 1 and 2.

Referring to FIG. 9, the backlight unit 10-6 and the liquid crystal display device 1-6 including it include a support dam 650-6 and a transparent member 1900 disposed on the support dam 650-6. -6), a first adhesive member (1100-6) disposed in close contact with the side of the transparent member (1900-6) and the support dam (650-6), and a first adhesive member (1100-6) adhered to the light incident surface (700a) of the light guide plate (700). 2 It may include an adhesive member 1200-6 and a reinforcing member 1500-6 disposed between the first adhesive member 1100-6 and the second adhesive member 1200-6.

Here, among the shape maintaining members 1000-6, the transparent member 1900-6 may be disposed on the mounting surface 654 of the support dam 650-6, the first adhesive member 1100-6, and the second adhesive member 1100-6. The adhesive member 1200-6 and the reinforcing member 1500-6 may be adhered to the bottom surface () of the bottom cover ().

Only the transparent member (1900-6) is placed on the support dam (650-6), and the first adhesive member (1100-6), the second adhesive member (1200-6), and the reinforcing member (1500-6) are used as a bottom cover. By placing it on (900), handling and workability can be improved.

For example, the transparent member 1900-6 may be easily fastened to the light source package 500-6. That is, the light source package 500-6 can be mounted on the mounting surface 654 of the support dam 650-6 and then fastened by inserting the transparent member 1900-6 on the support dam 650-6. there is.

Then, after fastening the transparent member (1900-6) to the light source package (500-6), the first adhesive member (1100-6), the second adhesive member (1200-6), and the reinforcing member (1500-6) are connected to the light source package (500-6). By adhering to the front of the package 500-6, workability becomes easier and mass production can be improved.

In this way, the reinforcing member 1500-6, which reinforces the flexibility of the first adhesive member 1100-6 and the second adhesive member 1200-6, is connected to the first adhesive member 1100 and the second adhesive member 1200-6. 6) The shape maintaining member 1000-6 placed in between is placed on the bottom cover 900, and only the transparent member 1900-6 is placed on the support dam 650-6 to improve workability and processability. It can be improved.

Therefore, the backlight unit 10-6 according to this embodiment and the liquid crystal display device 1-6 including the same have a shape maintaining member 1000- that has a uniform thickness, is highly reliable even at high temperatures, and maintains elasticity. Through 6), the mass productivity of the backlight unit 10-6 can be improved, and the luminance uniformity of the liquid crystal display device 1-6 can be improved.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. In addition, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and therefore the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

1: Liquid crystal display device 10: Backlight unit
100: Top cover 200: Liquid crystal panel
300: Guide cover 500: Light source package
600: Light source assembly 650: Support dam
700: light guide plate 800: reflective sheet
900: Bottom cover 1000: Shape maintenance member
1100: first adhesive member 1200: second adhesive member
1500: Reinforcing member 1900: Transparent member

Claims (14)

light guide plate;
a light source assembly disposed adjacent to the light incident surface of the light guide plate and irradiating light to the light incident surface; and
Comprising a shape maintaining member disposed between the light source assembly and the light incident surface,
The shape maintaining member is,
A first adhesive member adhered to the light emitting surface of the light source assembly,
A second adhesive member adhered to the light receiving surface,
It includes at least one reinforcing member disposed between the first adhesive member and the second adhesive member to maintain the shape,
The light source assembly includes a light source package including a light source, and a support dam on which the light source package is mounted,
Includes a bottom cover accommodating the light source assembly, light guide plate, and shape maintaining member,
The shape maintaining member is disposed on the bottom cover or the support dam and further includes a transparent member between the support dam and the first adhesive member,
The transparent member includes an open portion that is open corresponding to the shape of the light source package so that the light source package can be inserted. According to clause 1,
The reinforcing member is,
A backlight unit disposed between the first adhesive member and the second adhesive member, wherein the thickness of the first adhesive member is equal to or greater than the thickness of the second adhesive member. According to clause 1,
The shape maintaining member is a backlight unit in which the first adhesive member, the reinforcing member, and the second adhesive member have different refractive indices. According to clause 1,
The shape maintaining member is formed of multiple layers having different refractive indices,
A backlight unit in which the plurality of layers are arranged so that their refractive index sequentially increases in the direction from the light source assembly to the light guide plate. According to clause 4,
Among the plurality of layers, a layer adhesively disposed on the light guide plate has a refractive index that is the same as that of the light guide plate or a refractive index difference within a range of 0.1. According to claim 1,
The reinforcing member is a backlight unit formed of any one selected from the group consisting of PET (polyethylene terephthalate), PEN (Polyethylene naphthalate), PI (Polyimide), polymethyl methacrylate (PMMA), and polycarbonate (PC: PolyCarbonate). . According to claim 1,
The first adhesive member or the second adhesive member is a backlight unit formed of UV Acryl series. According to claim 1,
The backlight unit further includes a diffusion bead in at least one of the first adhesive member, the second adhesive member, and the reinforcing member. delete delete According to claim 1,
The transparent member is a backlight unit formed of white PET (polyethyleneterephthalate). According to claim 1,
The support dam is a backlight unit seated along the side wall of the bottom cover. According to claim 1,
The support dam is,
A backlight unit mounted along the bottom of the bottom cover. A light guide plate, a light source assembly disposed adjacent to the light input surface of the light guide plate to irradiate light to the light input surface, and a shape maintenance member disposed between the light source assembly and the light input surface, wherein the shape maintenance member includes the light source assembly. A backlight unit including a first adhesive substrate, a portion of which is disposed, a second adhesive substrate adhered to the light receiving surface, and a reinforcing member disposed between the first adhesive substrate and the second adhesive substrate to maintain the shape; and
It includes a liquid crystal panel disposed on the backlight unit,
The light source assembly includes a light source package including a light source, and a support dam on which the light source package is mounted,
Includes a bottom cover accommodating the light source assembly, light guide plate, and shape maintaining member,
The shape maintaining member is disposed on the bottom cover or the support dam and further includes a transparent member between the support dam and the first adhesive member,
The transparent member includes an open portion that is open corresponding to the shape of the light source package so that the light source package can be inserted.

Images